Switch PepperBrokerObserver to use WebContentsUserData.

chrome/browser/ui/tab_contents/tab_contents.cc

Index: chrome/browser/ui/tab_contents/tab_contents.cc
diff --git a/chrome/browser/ui/tab_contents/tab_contents.cc b/chrome/browser/ui/tab_contents/tab_contents.cc
index 55570cffc7e9335b978476d31a47db2fa74946fb..07c94c1061d2511a3f52ef5195481737b4314893 100644
--- a/chrome/browser/ui/tab_contents/tab_contents.cc
+++ b/chrome/browser/ui/tab_contents/tab_contents.cc
@@ -142,6 +142,7 @@ TabContents::TabContents(WebContents* contents)
   password_manager_delegate_.reset(new PasswordManagerDelegateImpl(this));
   password_manager_.reset(
       new PasswordManager(contents, password_manager_delegate_.get()));
+  PepperBrokerObserver::CreateForWebContents(contents);
   PluginObserver::CreateForWebContents(contents);
   prefs_tab_helper_.reset(new PrefsTabHelper(contents));
   prerender_tab_helper_.reset(new prerender::PrerenderTabHelper(this));
@@ -171,7 +172,6 @@ TabContents::TabContents(WebContents* contents)
 
   external_protocol_observer_.reset(new ExternalProtocolObserver(contents));
   navigation_metrics_recorder_.reset(new NavigationMetricsRecorder(contents));
-  pepper_broker_observer_.reset(new PepperBrokerObserver(contents));
   safe_browsing_tab_observer_.reset(
       new safe_browsing::SafeBrowsingTabObserver(this));